Monitor Internal, Public and 3rd Party APIs and Web

  • Start API Monitors with a simple click
  • Get Alerted to Performance Bottlenecks
  • Monitor Around The Globe, 24x7
  • Start with SoapUI and Ready! API Tests

APIs are taking the world by a storm. The APIs you consume bring data and services to your applications, drive traffic and accelerate internal projects. The APIs you provide bring you revenue, increase footprint and open a path to innovation. As you strive to deliver world class websites, web applications, mobile and SaaS applications, make sure the APIs that empower them are running smoothly.

AlertSite enables you to monitor your internal, partner or public APIs, effortlessly. AlertSite monitors both REST and SOAP APIs for availability, performance and functional correctness.

Availability, Performance and Functional Correctness

AlertSite, Your API Readiness Partner

Ensure availability, performance and functional correctness

Monitor Globally or within your Network

  • Monitor APIs from an independent network of over 340 nodes located globally
  • Or monitor within your network, behind your firewall.

Reuse Existing Functional Scripts

  • Seamlessly integrate with SoapUI and Ready! API
  • Reuse existing functional scripts created by dev/test teams
  • Monitor actual functionality of APIs

Complete Picture of Application Health

  • Correlate API performance to application performance
  • Find & fix API issues early to speed up delivery
  • Monitor internal, partner and 3rd party APIs

Proactively Find and Fix Issues

  • In case of failures engage the right people at the right time
  • Fastest and most intelligent alerting
  • Root cause analysis & transaction tracing

Value for Money

  • Easy to deploy
  • Cost Effective
  • Fastest Time to Value
  • Monitor APIs, web, mobile, and SaaS applications in one unified platform

Ensure Complete API quality

Not all APIs are created equally. Then why monitor them the same way? For internal, partner or public APIs, just checking the endpoint responsiveness is not enough.  Easily create performance monitors and advanced API monitors with assertions. Check if the API is up and running, performing within the desired threshold and returning right data at the right place. AlertSite helps you see your APIs through 3 critical lenses of API quality - availability, performance and functional correctness.

Ensure complete API quality and make your internal stakeholders and end customers happy.

Monitor the APIs you Consume

You may not be providing APIs, but it is highly likely that your consuming them daily.  Services such as location or mapping and are common third-party APIs that you might use. What happens to your business if they are unavailable, slow or incorrect? Poorly performing APIs break your applications and make your users suffer. The only way to ensure the performance of the APIs you consume is to proactively monitor them.

Hold your API vendors accountable by monitoring the APIs you consume. 


Monitor Internal APIs and Web Services

For internal APIs, your customers are line of business users and other teams in your organization. Slow or dysfunctional internal APIs affect your internal applications and decelerate innovation - AlertSite helps you monitor internal APIs and find and fix issues, proactively. Monitoring APIs continually throughout the application development lifecycle helps you detect and fix issues early on, aiding to continuous deployment and DevOps initiatives.

You can also monitor your internal APIs via our private nodes placed in custom monitoring stations in your local network, data center, or on arbitrary computers. 

Integrations That Enhance AlertSite Functionality

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No One Knows APIs like SmartBear

AlertSite is a product of SmartBear Software, the creators of SoapUI - the most popular API testing tool in the world, Ready! API - SmartBear's API readiness platform, and Swagger - the most innovative API framework. Over 3 million software professionals across 194 countries use SmartBear tools to deliver quality software.

AlertSite seamlessly integrates with SoapUI and Ready! API so that you can continue testing your APIs for functional correctness in production - across our global network or behind your firewall.

No coding. Fast deployment.

Creating API monitors with AlertSite is intuitive and almost instantaneous. Simply provide API endpoint to create basic availability monitors or upload existing functional test projects created in Ready! API and SoapUI to create advanced API monitors. Set availability and/or performance alerts on APIs with just few clicks.

Use AlertSite private nodes to monitor internal APIs within your network, behind the firewall.

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Fastest Alerting on the Planet

AlertSite's advanced alerting and reporting mechanism helps you get instant actionable insights from your monitoring data. Our alerts are the fastest - sent directly from the monitoring nodes - and the most intelligent - customizable recipients, routing paths and notification methods. AlertSite integrates with leading incident management and operational intelligence platforms to help you resolve issues faster and get real time visibility into business and IT metrics.

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Don't Settle for Basic API Monitoring, Choose AlertSite

  • Migration experts ready to help switch you from your current vendor
  • Effortlessly Migrate or rescript your current tests in AlertSite
  • Free onboarding and training to help you get up and running in no time

Value for Money

  • Easy to deploy
  • Easy to use
  • No coding required
  • Fastest Time to Value
  • Premium synthetic monitoring for less

Premium Synthetic Monitoring

  • Unified platform to proactively ensure API and application health
  • Find and Fix performance issues before they impact your users and business
  • Fastest Alerting on the Planet

Active Partnerships

  • Make AlertSite your performance partner
  • Be part of our Customer Advisory Board and make your voice heard
  • Excellent support and customer success advisors to help you become an AlertSite pro

Ecosystem Friendly

Seamlessly integrates with all of your NOC essentials:

  • AppDynamics
  • PagerDuty
  • Splunk
  • Perfecto Mobile
  • Ready! API
AlertSite ResourcesSee More...

Revelex Success

Explore how Revelex, a developer of innovative travel technology solutions, relies on AlertSite to support client SLA data and identify and repair client application performance issues before they surface

Read Case Study

Guide to API Monitoring

Most of us can now say that we have built our web applications on a foundation of APIs, both internal and external. With so much emphasis on the tiny API, it’s important to recognize its inherent power

Read eBook

Why Monitor With AlertSite

Your web and mobile business needs uninterrupted service 24/7. Slow webpage load times mean lost revenue and dissatisfied customers.

Read Article


Alertsite Shines Bright for LunaWarehouse. LunaWarehouse is a commercial and residential lighting retailer that conducts the majority of its business online.

Read Case Study
Ready to Try AlertSite?
Questions? Email us at or call: U.S. +1 617-684-2600, EMEA +353 91-398300